| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more contributor license |
| * agreements. See the NOTICE file distributed with this work for additional information regarding |
| * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the License. You may obtain a |
| * copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software distributed under the License |
| * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express |
| * or implied. See the License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package org.apache.geode.internal.cache.partitioned.rebalance; |
| |
| import org.apache.geode.internal.cache.partitioned.rebalance.model.PartitionedRegionLoadModel; |
| |
| /** |
| * The composite director performs a complete rebalance, which can remove over redundant buckets, |
| * satisfy redundancy, move buckets, and move primaries. |
| * |
| * This is the most commonly used director. |
| * |
| * |
| */ |
| public class CompositeDirector extends RebalanceDirectorAdapter { |
| |
| private boolean initialRemoveOverRedundancy; |
| private boolean initialSatisfyRedundancy; |
| private boolean initialMoveBuckets; |
| private boolean initialMovePrimaries; |
| |
| private boolean removeOverRedundancy; |
| private boolean satisfyRedundancy; |
| private boolean moveBuckets; |
| private boolean movePrimaries; |
| |
| private final RemoveOverRedundancy removeOverRedundancyDirector = new RemoveOverRedundancy(); |
| private final SatisfyRedundancy satisfyRedundancyDirector = new SatisfyRedundancy(); |
| private final MovePrimaries movePrimariesDirector = new MovePrimaries(); |
| private final MoveBuckets moveBucketsDirector = new MoveBuckets(); |
| |
| private PartitionedRegionLoadModel model; |
| |
| /** |
| * @param removeOverRedundancy true to remove buckets that exceed redundancy levels |
| * @param satisfyRedundancy true to satisfy redundancy as part of the operation |
| * @param moveBuckets true to move buckets as part of the operation |
| * @param movePrimaries true to move primaries as part of the operation |
| */ |
| public CompositeDirector(boolean removeOverRedundancy, boolean satisfyRedundancy, |
| boolean moveBuckets, boolean movePrimaries) { |
| this.initialRemoveOverRedundancy = removeOverRedundancy; |
| this.initialSatisfyRedundancy = satisfyRedundancy; |
| this.initialMoveBuckets = moveBuckets; |
| this.initialMovePrimaries = movePrimaries; |
| } |
| |
| |
| |
| @Override |
| public boolean isRebalanceNecessary(boolean redundancyImpaired, boolean withPersistence) { |
| // We can skip a rebalance is redundancy is not impaired and we |
| // don't need to move primaries. |
| return redundancyImpaired || (initialMovePrimaries && withPersistence); |
| } |
| |
| |
| |
| @Override |
| public void initialize(PartitionedRegionLoadModel model) { |
| this.model = model; |
| this.removeOverRedundancy = initialRemoveOverRedundancy; |
| this.satisfyRedundancy = initialSatisfyRedundancy; |
| this.moveBuckets = initialMoveBuckets; |
| this.movePrimaries = initialMovePrimaries; |
| this.removeOverRedundancyDirector.initialize(model); |
| this.satisfyRedundancyDirector.initialize(model); |
| this.moveBucketsDirector.initialize(model); |
| this.movePrimariesDirector.initialize(model); |
| } |
| |
| @Override |
| public void membershipChanged(PartitionedRegionLoadModel model) { |
| initialize(model); |
| } |
| |
| @Override |
| public boolean nextStep() { |
| boolean attemptedOperation = false; |
| if (this.removeOverRedundancy) { |
| attemptedOperation = removeOverRedundancyDirector.nextStep(); |
| } |
| if (!attemptedOperation) { |
| this.removeOverRedundancy = false; |
| } |
| |
| if (!attemptedOperation && this.satisfyRedundancy) { |
| attemptedOperation = satisfyRedundancyDirector.nextStep(); |
| } |
| if (!attemptedOperation) { |
| this.satisfyRedundancy = false; |
| } |
| |
| if (!attemptedOperation && this.moveBuckets) { |
| attemptedOperation = moveBucketsDirector.nextStep(); |
| } |
| if (!attemptedOperation) { |
| this.moveBuckets = false; |
| } |
| |
| if (!attemptedOperation && this.movePrimaries) { |
| attemptedOperation = movePrimariesDirector.nextStep(); |
| } |
| if (!attemptedOperation) { |
| this.movePrimaries = false; |
| } |
| |
| return attemptedOperation; |
| } |
| |
| } |